| 151 | Safety guidelines for water quality fieldwork |
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| 152 | Contribution of small streams to potential fish production in the Conwy catchment |
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| 153 | Annual review of fisheries : 1st April 1990 - 31st March 1991 |
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| 154 | Dee stock assessment programme : annual report 1993 |
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| 155 | Welsh Regional plan summary 1991/92 (bilingual) : Rhanbarth Cymru crynodeb cynllun 1991/92 |
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| 156 | A review of the industrial uses of continuous monitoring systems : metals industry processes |
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| 157 | Policy and practice for the protection of floodplains |
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| 158 | National Rivers Authority 1993/94 corporate plan and forward look to 1996/97 : summary |
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| 159 | Past achievements, present activities, future vision : annual review and summary accounts 1994-95 |
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| 160 | Water pollution incidents in England and Wales 1996 |
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| 161 | Proposed scheme of charges in respect of discharges to controlled waters |
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| 162 | Water quality fact file 4/9 |
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| 163 | The investigation of the Taff litter problem : report no. PL/EAE/89/2 |
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| 164 | Proposals to extend MCERTS to continuous ambient air-quality monitors |
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| 165 | Blue-green algal monitoring 1995-1997 |
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| 166 | Sources of farm pollution and impact on river quality : interim report (001/6/W) |
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| 167 | Proposed scheme of abstraction charges 1993-94 |
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| 168 | The Use of a Hydroacoustic Counter for Assessing Salmon Stocks |
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| 169 | Pesticides in the aquatic environment 1997 : executive summary |
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| 170 | SSO improvement strategy (proposed method of priority assessment) - EAR/90/20 |
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| 171 | Corporate performance monitoring report : (Annex 1) |
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| 172 | Snapshots of the environment : a new environmental approach |
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| 173 | Seminar on water pollution control |
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| 174 | Water pollution incidents in England and Wales 1997 : report summary |
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| 175 | 1993/94 corporate plan and forward look to 1996/97 |
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